content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.common;
  
  import java.util.concurrent.Future;
  
  import io.reactivex.common.annotations.NonNull;
  import io.reactivex.common.functions.Action;
  import io.reactivex.common.internal.disposables.*;
  import io.reactivex.common.internal.functions.*;
  
  /**
   * Utility class to help create disposables by wrapping
   * other types.
   * @since 2.0
   */
  public final class Disposables {
      /** Utility class. */
      private Disposables() {
          throw new IllegalStateException("No instances!");
      }
  
      /**
       * Construct a Disposable by wrapping a Runnable that is
       * executed exactly once when the Disposable is disposed.
       * @param run the Runnable to wrap
       * @return the new Disposable instance
       */
      @NonNull
      public static Disposable fromRunnable(@NonNull Runnable run) {
          ObjectHelper.requireNonNull(run, "run is null");
          return new RunnableDisposable(run);
      }
  
      /**
       * Construct a Disposable by wrapping a Action that is
       * executed exactly once when the Disposable is disposed.
       * @param run the Action to wrap
       * @return the new Disposable instance
       */
      @NonNull
      public static Disposable fromAction(@NonNull Action run) {
          ObjectHelper.requireNonNull(run, "run is null");
          return new ActionDisposable(run);
      }
  
      /**
       * Construct a Disposable by wrapping a Future that is
       * cancelled exactly once when the Disposable is disposed.
       * @param future the Future to wrap
       * @return the new Disposable instance
       */
      @NonNull
      public static Disposable fromFuture(@NonNull Future<?> future) {
          ObjectHelper.requireNonNull(future, "future is null");
          return fromFuture(future, true);
      }
  
      /**
       * Construct a Disposable by wrapping a Future that is
       * cancelled exactly once when the Disposable is disposed.
       * @param future the Future to wrap
       * @param allowInterrupt if true, the future cancel happens via Future.cancel(true)
       * @return the new Disposable instance
       */
      @NonNull
      public static Disposable fromFuture(@NonNull Future<?> future, boolean allowInterrupt) {
          ObjectHelper.requireNonNull(future, "future is null");
          return new FutureDisposable(future, allowInterrupt);
      }
  
      /**
       * Returns a new, non-disposed Disposable instance.
       * @return a new, non-disposed Disposable instance
       */
      @NonNull
      public static Disposable empty() {
          return fromRunnable(Functions.EMPTY_RUNNABLE);
      }
  
      /**
       * Returns a disposed Disposable instance.
       * @return a disposed Disposable instance
       */
      @NonNull
      public static Disposable disposed() {
          return DisposedDisposable.INSTANCE;
      }
  }
  